Search in more than one field
Example: If you are looking for books by Alan Moore in the sales section type "*moore*alan*" in "Creator" and select "Sale!" for "Section".

Search for different issues of similar titles
Example: Type "vertigo pop*", "ultimate*x-men*tp*" or "*transformers*" in "Title". The same applies to different titles
of a (smaller!) publisher. Example: Type "oni*" in "Publisher".

Search in the important field "Issue"
Example: Type in "*-c" to have variant covers listed.